RDSK-9311: (gripper/input-controller) Guard against nil responses in rdk client/servers #17074

Job	Run time
appimage-ignore-tests	0s
static-ignore-tests	0s
license_finder / Audit 3rd-Party Licenses	1m 14s
test / linux-amd64 Go Unit Tests	15m 52s
macos / build	3m 39s
test / linux-arm64 Go Unit Tests	16m 39s
test / Go 32-bit Unit Tests	12m 11s
test / Test meta.json jsonschema	22s
test / Test Longer-running Motion Plans if affected / Check files	8s
test / Test Longer-running Motion Plans if affected / Motion Extended Tests	0s
test / All Tests Passing	1s
static	0s
appimage	0s
droid / droid-build	0s
	50m 6s

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